package com.zyong.design.pattern.interpret.case2;

/**
 * 变量表达式
 * @program: zyong-design-pattern
 * @ClassName: Variable
 * @author: zyong
 * @create: 2024-06-01 22:05
 */
public class Variable extends Expression {
    private String name;

    public Variable(String name) {
        this.name = name;
    }

    @Override
    public boolean interpret(Context ctx) {
        return ctx.lookup(this);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj != null && obj instanceof Variable) {
            return this.name.equals(((Variable) obj).name);
        }

        return false;
    }

    @Override
    public int hashCode() {
        return this.toString().hashCode();
    }

    @Override
    public String toString() {
        return name;
    }
}
